The Syrian military has been combing through a vast network of tunnels built by jihadists in Douma, not far from Damascus. RT Arabic filmed vehicles easily fitting in the passages and asked locals how the militants treated them.

Located 15 meters deep under the surface, the massive tunnels are supported by metal pillars and are paneled with some sort of liner plates, creating a subway look. They stretch for kilometers under the town, located in the area of eastern Ghouta, forming an entire city beneath the city.

To complete the set, the tunnels are equipped with electricity, parking lots and workshops. They are so big that a minivan could easily move through them, as seen in the footage. The military discovered that the tunnels were specifically used to stockpile machinery and vehicles.

The militants forced the locals to build the tunnels for them by starving the people, who refused to work, Douma residents told RT. “They starved us, they harassed us,” one man said, adding that the extremists also made captives and civilians work on the tunnels. “They [the militants] would not feed those, who refused to work,” he said.

The Russian military said they found a chemical laboratory operated by militants in central Douma soon after the city’s liberation. The facility, located in the basement of a residential building, had some sophisticated equipment, including an industrial chemical reactor, which the military said was used by the jihadists to create toxic agents. Vast stockpiles of various chemicals were also found in the laboratory.